OJEE Genetic Drift — practice questions

Explore 2 free Genetic Drift questions in OJEE Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Genetic Drift questions and exercises with answers

Showing questions 1–2 of 2.

**Genetic drift** is:Read the answer and worked solution →Spot the trait Mendel never usedRead the answer and worked solution →

Worked practice questions

Genetic drift is:

Movement of genes due to natural selection
Random fluctuation of allele frequencies in a population, especially significant in small populations
Mutation rate in germ cells
Migration of populations

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Correct answer: B. Random fluctuation of allele frequencies in a population, especially significant in small populations

Genetic drift is random (non-selective) change in allele frequency due to sampling variance — especially powerful in small populations. The 'Sewall Wright effect'. Can cause alleles to be fixed or lost purely by chance.

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Spot the trait Mendel never used

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Questions

Items
1. Seed shape
2. Leaf size
3. Pod colour
4. Flower position
Odd item
Leaf size
Items
1. Plant height
2. Seed colour
3. Root depth
4. Pod shape
Odd item
Root depth
Items
1. Flower colour
2. Pod colour
3. Seed shape
4. Stem thickness
Odd item
Stem thickness

Instructions

Three traits in each row are ones Mendel followed in his pea plants. Tap the fourth.

_Source: Qallery verified question bank, MHT CET, topic Inheritance and Variation_

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